Armature for electric machines



(N0 Model.)

0. B. SHALLENBERGER.

AEMATUEE ECE ELECTRIC MACHINES.

Patented May 29, 1888.

N PETERS. Phnmnmgnplwr, washingmn, PEG

UNITED STATES PATENT OEEICE.

OLIVER B. SHALLENBERGER, OF ROCHESTER, ASSIGNOR TO THE VESTING- HOUSEELECTRIC COMPANY, OF PITTSBURG, PENNSYLVANIA.

ARMATURE FOR ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 383,664, dated May 29,1888.

Application tiled September l, 1887. Serial No. 248,466.

To all whom, it may concern.:

Be it known that I, OLIVER B. SHALLEN- BERGER, a citizen of the UnitedStates, residing in Rochester, in the county of Beaver and State ofPennsylvania, haveinvented certain new and useful ImprovenientsinArniatures for Electric Machines, of which the following is aspecitication.

The invention relates, generally, to the con- Io struction ofthearmatures of electric machines, and especially to a method of separatingthe wires conveying currents of considerable difference of potentialfrom each other.

The invention consists in placing between the separate sets ofconvolutions of inductive wire applied to armatures of the typedescribed in an application for Letters Patent, Serial No. 223,009,strips of insulating material of sufticient width to prevent a shortcircuit from being formed between wires which lie adjacent to eachother.

In the accompanying drawings there is shownin Figurel au end View of aportion of an armature with the strips applied, and Fig. 2 is anelevation of the armature.

Referring to the figures, A represents the armatureshaft, and B thecore. Upon this core there is wound the inductive wire C in separatesets of convolutions c c2, &c. The wire is wound across the face ofthearmature around strips m of non-magnetic material, and under overhangingclips m, placed at the respective ends of these strips. After asufcientamount (No modrl.)

` of wire has been applied to complete any given set of convolutions, itis carried to the succeeding set of clips and wound in a similar manner.Itwill be understood, however, that there must necessarily be aconsiderable difference of potential between two adjacent wires, d d2,which constitute the outer convolutions of two adjacent sets. Whencurrents of high potential are thus brought near to ea'ch other, thereis more or less danger of a short circuit being formed between them. Toobviate this I place strips e of non-magnetic materialsuch as vulcanizedfiber or leatheroid-along the face of the armature in a proper positionto separate the outer wires of each two adjacent sets of convolutions.

I claim as my invention-A 5o In an armature for electric machines, acore of magnetic material, inductive wire wound in separate sets ofconvolutions arranged iat upon the face of the armature-core,non-magneticlugs about which the convolutions are wound, and strips ofinsulating material separating the outer wires of adjacentsets ofconvolutions from each other.

In testimony whereof I have hereunto subscribed niy name this 6th day ofMay, A. D. 6o 1887.

OLIVER B. SHALLENBERGER.

